[frr] 2 MPLS Questions

Jeff Tantsura jefftant at gmail.com
Thu Mar 23 13:36:12 EDT 2017

if there’s no performance impact - 8 is a safe choice 


> On Mar 23, 2017, at 10:34, Amine Kherbouche <amine.kherbouche at 6wind.com> wrote:
> Olivier,
> The best for me, is to have the possibility to recompile the MPLS kernel module with the new value the MAX_LABEL_STACK and then let our Segment Routing implementation read this value to determine what's feasible.
> Yes but we still need a default value.
> You have also to see the perf impact, now the current mpls entry size in linux kernel is under
> a cache line, even using 12 stacked labels, we are always under a cache line but beyond
> this value we're going to see performance issue.
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